Brodney Pool left Jets practice after suffering a head injury colliding with Darrelle Revis, ESPN.com reports.

“We took him off the practice field,” Rex Ryan said, according to the website. “(It was) more precautionary than anything else, but he got smacked in the head. He’s being looked at right now, but they just collided into each other. We’d rather be safe than sorry … It was kind of late during practice, so he didn’t come back.”

NJ.com reports Revis got up right after the two collided covering a crossing pattern.